diff --git a/Common/make/ghdl.mk b/Common/make/ghdl.mk
index 1703d47..92ba9a7 100644
--- a/Common/make/ghdl.mk
+++ b/Common/make/ghdl.mk
@@ -56,6 +56,7 @@ all:  analyze
 
 $(WORK_DIR):
 	mkdir -p $@
+	cp $(TARGET).gtkw $(BUILD_DIR)
 
 syntax: 
 	$(GHDL) -s $(GHDL_OPTS) $(SRCS)
diff --git a/Makefile b/Makefile
index eb36a72..6ef7c0a 100644
--- a/Makefile
+++ b/Makefile
@@ -13,3 +13,6 @@ run:
 clean:
 	$(INSTR)
 
+mrproper:
+	$(INSTR)
+